csv.write skipping lines when writing to csv

Question

I am trying to write to a csv file via the following

file = open(\'P:\\test.csv\', \'a\') 

fieldnames = (\'ItemID\', \'Factor\', \'FixedAmount\')
wr = csv.D         


        

Answer 1

Could it be that you are opening the output file in append mode?

file = open('P:\test.csv', 'a') 
#                           ^

Instead of write mode? If you run the program several times, the output from every run will be in that file...

Answer 2

You need to pass an additional parameter to the 'open()' function:

file = open('P:\test.csv', 'a', newline='')

This will keep it from skipping lines.

Answer 3

I had this problem and it was because I was using \n\r. I changed to \n and it is working now.

Answer 4

Solution is to specify the "lineterminator" parameter in the constructor:

file = open('P:\test.csv', 'w')

fields = ('ItemID', 'Factor', 'FixedAmount')
wr = csv.DictWriter(file, fieldnames=fields, lineterminator = '\n')

wr.writeheader()
wr.writerow({'ItemID':1, 'Factor': 2, 'FixedAmount':3})
file.close()

Answer 5

Twenty quatloos says you're running under windows (well, a hundred, given that your file is called P:\test.csv). You're probably getting extra \rs.

[edit]

Okay, since using binary mode causes other problems, how about this:

file = open('P:\test.csv', 'w', newline='')